Learn more about two great innovative camera features

LINE SCAN BAR >

Fast and precise, flat and wide

Structured lighting

This technique projects accurate patterns onto a target and then measures the
displacement or distortion in order to calculate the shape, size or position
of the object. In the easiest form, a line is projected onto a target and
observed under a known angle from a camera. The distortions in the line can
then be translated into height variations. This technique is often referred to
as laser triangulation. Structured illumination is often used to obtain height
information and especially for 3D inspection tasks.

Uses for this technique include: inspection of food items to check for correct
volume or product deformations and foreign object inclusion. It can also be
used to check the surface profile of objects against known good examples or a
golden template to ensure perfect product quality.

To obtain the most accurate 3D information, very narrow and sharp illuminated
lines are required. This is usually achieved by using laser technology or
structured LED illumination. In addition a narrow pass filter is fixed on the
camera, only transmitting the reflected laser or LED light with no ambient
light.

Structured lighting is also widely used in alignment applications where
markers are required to adjust tools or components and is also employed in
medical applications such as the placement of patients for X-ray or radiation.

This technique projects accurate patterns onto a target and then measures the displacement or distortion in order to calculate the shape, size or position of the object. In the easiest form, a line is projected onto a target and observed under a known angle from a camera.